A 10-Bit 300 kS/s Reference-Voltage Regulator Free SAR ADC for Wireless-Powered Implantable Medical Devices

Yang, Yongkui; Zhou, Jun; Liu, Xin; Goh, Wang Ling

doi:10.3390/s18072131

Open AccessArticle

A 10-Bit 300 kS/s Reference-Voltage Regulator Free SAR ADC for Wireless-Powered Implantable Medical Devices

by

Yongkui Yang

¹

,

Jun Zhou

^2,*,

Xin Liu

¹ and

Wang Ling Goh

¹

School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore

²

School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

^*

Author to whom correspondence should be addressed.

Sensors 2018, 18(7), 2131; https://doi.org/10.3390/s18072131

Submission received: 29 April 2018 / Revised: 19 June 2018 / Accepted: 22 June 2018 / Published: 3 July 2018

(This article belongs to the Special Issue Wearable and Implantable Sensors and Electronics Circuits)

Download

Browse Figures

Versions Notes

Abstract

This paper presents a reference-voltage regulator free successive-approximation-register analog-to-digital converters (SAR ADC) with self-timed pre-charging for wireless-powered implantable medical devices. Assisted by a self-timed pre-charging technique, the proposed SAR ADC eliminates the need for a power-hungry reference-voltage regulator and area-consuming decoupling capacitor while maintaining insensitivity to the supply voltage fluctuation. Fabricated with a 0.18-µm complementary metal–oxide–semiconductor (CMOS) technology, the proposed SAR ADC achieves a Signal To Noise And Distortion Ratio (SNDR) of 53.32 dB operating at 0.8 V with a supply voltage fluctuation of 50 mV_pp and consumes a total power of 2.72 µW at a sampling rate of 300 kS/s. Including the self-timed pre-charging circuits, the total figure-of-merit (FOM) is 23.9 fJ/conversion-step and the total area occupied is 0.105 mm².

Keywords: SAR ADC; low power; reference-voltage regulator free; implantable; medical device

Share and Cite

MDPI and ACS Style

Yang, Y.; Zhou, J.; Liu, X.; Goh, W.L. A 10-Bit 300 kS/s Reference-Voltage Regulator Free SAR ADC for Wireless-Powered Implantable Medical Devices. Sensors 2018, 18, 2131. https://doi.org/10.3390/s18072131

AMA Style

Yang Y, Zhou J, Liu X, Goh WL. A 10-Bit 300 kS/s Reference-Voltage Regulator Free SAR ADC for Wireless-Powered Implantable Medical Devices. Sensors. 2018; 18(7):2131. https://doi.org/10.3390/s18072131

Chicago/Turabian Style

Yang, Yongkui, Jun Zhou, Xin Liu, and Wang Ling Goh. 2018. "A 10-Bit 300 kS/s Reference-Voltage Regulator Free SAR ADC for Wireless-Powered Implantable Medical Devices" Sensors 18, no. 7: 2131. https://doi.org/10.3390/s18072131

APA Style

Yang, Y., Zhou, J., Liu, X., & Goh, W. L. (2018). A 10-Bit 300 kS/s Reference-Voltage Regulator Free SAR ADC for Wireless-Powered Implantable Medical Devices. Sensors, 18(7), 2131. https://doi.org/10.3390/s18072131

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Menu

A 10-Bit 300 kS/s Reference-Voltage Regulator Free SAR ADC for Wireless-Powered Implantable Medical Devices

Abstract

Share and Cite

Article Metrics

Article Access Statistics

Further Information

Guidelines

MDPI Initiatives

Follow MDPI